Wyoming, 2003

Winter Storm in Wyoming, February 2, 2003

February 2, 2003 · NWS UNR · 5 events in 5 counties and zones

A strong storm system moved across the central Rockies and the central Plains during the morning and afternoon hours, bringing snow and gusty winds to northeastern Wyoming. Rain began to fall the previous evening and then changed to snow around midnight.

Where it happened

Every event with a place to put it; 5 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
5

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS UNR wrote it up.

A strong storm system moved across the central Rockies and the central Plains during the morning and afternoon hours, bringing snow and gusty winds to northeastern Wyoming. Rain began to fall the previous evening and then changed to snow around midnight. Snow increased in intensity during the early morning hours and continued into the afternoon. Snowfall across the area generally ranged from 4 to 8 inches, with up to 10 inches in the Bear Lodge Mountains. Gusty north winds caused considerable blowing and drifting of snow and reduced visibilities to around a quarter of a mile.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Rapid City, SD wrote its last area forecast discussion before the first event at Feb 1, 9:00 PM MST, 3 hours earlier.

Area forecast discussion, Feb 1, 9:00 PM MST, 3 hours before
AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY
NATIONAL WEATHER SERVICE RAPID CITY SD
900 PM MST SAT FEB 1 2003

CORRECTED FOR WINTER STORM WATCH

SEE THE PREVIOUS DISCUSSION FOR MORE DETAILS...BUT WE HAVE DECIDED
TO ISSUE A WINTER STORM WATCH ON SUNDAY FOR NERN WY AND MUCH OF WRN
SD. THIS FITS WELL WITH KRIW/KCYS...AND DOESNT HAVE MUCH OF AN
AFFECT ON THE KLBF/KFSD/KBIS/KBLX CWFAS. COORDINATED WITH KABR ON
THE ERN EXTENT...BUT WANTED TO GET IT OUT BEFORE THE 900 PM NEWS SO
THAT WAS THE EXTENT OF COORDINATION. THE DECISION TO GO WITH A WATCH
(VS. A WARNING OR ADVISORY) WAS MADE SO AS TO GIVE THE MID SHIFT
LEE-WAY IN THEIR DECISION...BASED ON ADDITIONAL OBSERVATIONAL AND
MODEL DATA.

ANYWAY...THE MODELS ARE FINALLY CATCHING ON TO THE STRONGER JET
STREAK ROUNDING THE BASE OF THE TROF OVER THE SWRN UNITED STATES
(EVEN A LIGHTNING STRIKE WAS NOTED IN CNTRL CA THIS EVNG). THIS IS
EXPECTED TO HAVE THE EFFECT OF A MORE PERSISTENT AND HEAVY BAND OF
PRECIP (AND EVENTUALLY SNOW) ACROSS THE CENTER OF THE CWFA. WOULD
NOT BE SURPRISED TO SEE SOME 6 INCH AMOUNTS BY SUNDAY AFTN.

.UNR...WINT STM WATCH SUNDAY FOR NERN WY AND MUCH OF WRN SD.

BUNKERS
Hazardous weather outlook, Feb 1, 8:34 AM MST, 15 hours 26 minutes before
SDZ001-002-012>014-024>032-041>044-046-047-049-072>074-WYZ054>058-
071-021430-

HAZARDOUS WEATHER OUTLOOK...CORRECTION
NATIONAL WEATHER SERVICE RAPID CITY SD
834 AM MST SAT FEB 1 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN SOUTH DAKOTA AND
NORTHEASTERN WYOMING.

.DAY ONE...TODAY AND TONIGHT

A STORM SYSTEM WILL TRACK ACROSS THE CENTRAL ROCKIES TONIGHT. SOME
LIGHT RAIN WILL SPREAD ACROSS NORTHEAST WYOMING AND WESTERN SOUTH
DAKOTA TODAY. THE RAIN WILL CHANGE TO SNOW TONIGHT...WITH SNOW
ACCUMULATIONS OF 1 TO 2 INCHES ACROSS NORTHEAST WYOMING AND THE
BLACK HILLS...WITH AN INCH OR LESS ON THE SOUTH DAKOTA PLAINS
ADJACENT TO THE BLACK HILLS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

SNOW WILL CONTINUE ACROSS NORTHEAST WYOMING AND SOUTHWESTERN
SOUTH DAKOTA ON SUNDAY. TOTAL SNOWFALL ACCUMULATIONS OF 1 TO 3
INCHES IS EXPECTED IN NORTHEAST WYOMING...WITH 2 TO 4 INCHES IN THE
BLACK HILLS. SOUTHWEST SOUTH DAKOTA AND THE PLAINS EAST OF THE BLACK
HILLS SHOULD SEE TOTAL SNOWFALL OF 1 TO 2 INCHES.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME FOR MONDAY THROUGH
FRIDAY.

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

5 winter storm. Local standard time, as filed.

Winter Storm, Northern Campbell

When
February 2, 12:00 AM MST to 4:00 PM MST
Where
Northern Campbell forecast zone
Reported by
TRAINED SPOTTER
Coordinates
44.248, -105.548 (the zone’s center; the record gives no point)

Winter Storm, South Campbell

When
February 2, 12:00 AM MST to 6:00 PM MST
Where
South Campbell forecast zone
Reported by
TRAINED SPOTTER
Coordinates
44.248, -105.548 (the zone’s center; the record gives no point)

Winter Storm, Western Crook

When
February 2, 12:00 AM MST to 1:00 PM MST
Where
Western Crook forecast zone
Reported by
TRAINED SPOTTER
Coordinates
44.589, -104.570 (the zone’s center; the record gives no point)

Winter Storm, Weston

When
February 2, 12:00 AM MST to 6:00 PM MST
Where
Weston forecast zone
Reported by
TRAINED SPOTTER
Coordinates
43.841, -104.568 (the zone’s center; the record gives no point)

Winter Storm, Wyoming Black Hills

When
February 2, 12:00 AM MST to 12:00 PM MST
Where
Wyoming Black Hills forecast zone
Reported by
TRAINED SPOTTER
Coordinates
44.215, -104.569 (the zone’s center; the record gives no point)

What these are

Winter Storm
A storm that brought snow, sleet or freezing rain at warning levels, usually over several hours or days.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Wyoming in 2003Every state in 2003This day in weather historyWarnings in Wyoming, February 2003

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5344528, 5344529, 5344530, 5344531, 5344532.